<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
    <style type="text/css">
        body, html {width: 100%;height: 100%;margin:0;font-family:"微软雅黑";}
        #allmap{width:100%;height:500px;}
        p{margin-left:5px; font-size:14px;}
    </style>
    <script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=XPFOXZxZCZwuGqFninoYGjkPiXhPt5uu"></script>
    <script type="text/javascript" src="http://api.map.baidu.com/library/AreaRestriction/1.2/src/AreaRestriction_min.js"></script>
    <title>设置地图显示范围</title>
</head>
<body>
<div id="allmap"></div>
<p>将地图显示范围设定在指定区域，地图拖出该区域后会重新弹回。</p>
</body>
</html>
<script type="text/javascript">
    //百度地图API功能
    var map = new BMap.Map("allmap");
    map.centerAndZoom(new BMap.Point(116.404, 39.915), 13);
    map.enableScrollWheelZoom();
    var b = new BMap.Bounds(new BMap.Point(116.027143, 39.772348),new BMap.Point(116.832025, 40.126349));
    try {
        BMapLib.AreaRestriction.setBounds(map, b);
    } catch (e) {
        alert(e);
    }
</script>
